After this lesson, you will be able to describe the design and function of control systems that remove sulfur oxides and particulates from flue gas. In addition, you will be able to outline recovery systems, which extract and concentrate the sulfur oxides present in flue gas and convert them into usable by-products. • Identify wastes contained in flue gases • Discuss the basic design and function of a scrubber • Identify the components of a typical wet scrubber and describe its operation • Identify the components of a typical dry scrubber and describe its operation